4000440040400 has 60 divisors (see below), whose sum is σ = 9674706728544. Its totient is φ = 1589578800000.

The previous prime is 4000440040393. The next prime is 4000440040483. The reversal of 4000440040400 is 40400440004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33055826 + ... + 33176625.

Almost surely, 2^{4000440040400} is an apocalyptic number.

4000440040400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000440040400 is an abundant number, since it is smaller than the sum of its proper divisors (5674266688144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4000440040400 is a wasteful number, since it uses less digits than its factorization.

4000440040400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66232620 (or 66232609 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 4000440040400 its reverse (40400440004), we get a palindrome (4040840480404).

The spelling of 4000440040400 in words is "four trillion, four hundred forty million, forty thousand, four hundred".